If you don't meet the pre-requisites of a class, but really want to get in, is there any way you will be able to?

It's possible, but unlikely. You might be waitlisted for the class, which means if people drop or more sections open up, you could be placed in. If it's a social studies class, talk to the AP, Ms. Suri, in room 302. She's really nice and accommodating, and will likely be willing to put you in the class if you show that you're passionate.